Richards Growth Model and Multi-Metaheuristic Optimization for Precision Irrigation and Fertilization Scheduling: An Extension of the Becker-Zohdi Framework
Abstract
Agricultural input costs are rising, and weather patterns are becoming more variable. These trends create a need for better methods to allocate water and fertiliser in farming. This paper extends the crop model developed by Becker and Zohdi [1]. We replace the logistic growth equation with the Richards model. The Richards model has a shape parameter that allows asymmetric growth. We also compare five metaheuristic algorithms. These are Genetic Algorithm (GA), Particle Swarm Optimisation (PSO), Differential Evolution (DE), Grey Wolf Optimiser (GWO), and a Hybrid GA-PSO. The study uses corn production data from Iowa. We test the methods on 21 stochastic weather scenarios. The Richards model captures the vegetative and reproductive phases of corn more accurately than the logistic model. Among the algorithms, GWO gives the highest average revenue. It achieves $903 per acre. This is higher than GA ($876/acre), DE ($884/acre), PSO ($891/acre), and Hybrid GA-PSO ($898/acre). This represents a 7% improvement over the original GA-logistic result of $842/acre. Statistical tests confirm the superiority of GWO with 95% confidence. The main findings are that asymmetric growth modelling improves optimisation results, especially under stress conditions. GWO provides a good balance between exploration and exploitation. This work provides a benchmark for metaheuristic performance in precision agriculture. It also shows that the Richards model is a better choice than the logistic model for this type of problem.
Keywords:
Precision agriculture, Richards growth model, Metaheuristic algorithms, Grey wolf optimiser, Irrigation scheduling, Crop optimisationReferences
- [1] Becker, C. J., & Zohdi, T. I. (2026). Optimizing irrigation and fertilization strategies for crop growth: A comparative study of genetic algorithm and model predictive control under weather uncertainty. Archives of computational methods in engineering, 1–31. https://doi.org/10.1007/s11831-026-10640-5
- [2] Economic Research Service. (2024). Farm income and wealth statistics. https://www.ers.usda.gov/data-products/farm-income-and-wealth-statistics
- [3] Zohdi, T. I. (2024). A machine-learning enabled digital-twin framework for next generation precision agriculture and forestry. Computer methods in applied mechanics and engineering, 431, 117250. https://doi.org/10.1016/j.cma.2024.117250
- [4] Mengi, E., Becker, C. J., Sedky, M., Yu, S. Y., & Zohdi, T. I. (2024). A digital-twin and rapid optimization framework for optical design of indoor farming systems. Computational mechanics, 74(1), 31–43. https://doi.org/10.1007/s00466-023-02421-9
- [5] Goodrich, P., Betancourt, O., Arias, A. C., & Zohdi, T. (2023). Placement and drone flight path mapping of agricultural soil sensors using machine learning. Computers and electronics in agriculture, 205, 107591. https://doi.org/10.1016/j.compag.2022.107591
- [6] Betancourt, J. O., Li, I., Mengi, E., Corrales, L., & Zohdi, T. I. (2024). A computational framework for precise aerial agricultural spray delivery processes: JO Betancourt et al. Archives of computational methods in engineering, 31(7), 4149–4162. https://doi.org/10.1007/s11831-024-10106-6
- [7] Verhulst, P. F. (1838). Notice sur la loi que la population suit dans son accroissement. Correspondence mathematique et physique, 10, 113–129. https://cir.nii.ac.jp/crid/1570009749935841536
- [8] Singh, A. (2012). An overview of the optimization modelling applications. Journal of hydrology, 466–467, 167–182. https://doi.org/10.1016/j.jhydrol.2012.08.004
- [9] Epperson, J. E., Hook, J. E., & Mustafa, Y. R. (1993). Dynamic programming for improving irrigation scheduling strategies of maize. Agricultural systems, 42(1-2), 85–101. https://doi.org/10.1016/0308-521X(93)90070-I
- [10] Wang, L., Xu, Y., & Xu, J. (2020). Realization of wireless charging in intelligent greenhouse with orthogonal coil system uniform magnetic field. Computers and electronics in agriculture, 175, 105524. https://doi.org/10.1016/j.compag.2020.105524
- [11] Goldberg, D. E. (1989). Genetic algorithms in search, optimization, and machine learning. Addison-Wesley Publishing Company. https://www.amazon.com/Genetic-Algorithms-Optimization-Machine-Learning/dp/0201157675
- [12] Jones, J. W., Hoogenboom, G., Porter, C. H., Boote, K. J., Batchelor, W. D., Hunt, L. A., ... & Ritchie, J. T. (2003). The DSSAT cropping system model. European journal of agronomy, 18(3-4), 235–265. https://doi.org/10.1016/S1161-0301(02)00107-7
- [13] Holzworth, D. P., Huth, N. I., deVoil, P. G., Zurcher, E. J., Herrmann, N. I., McLean, G., ... & Keating, B. A. (2014). APSIM–evolution towards a new generation of agricultural systems simulation. Environmental modelling & software, 62, 327–350. https://doi.org/10.1016/j.envsoft.2014.07.009
- [14] Van Diepen, C. V., Wolf, J. V., Van Keulen, H., & Rappoldt, C. W. O. F. O. S. T. (1989). WOFOST: A simulation model of crop production. Soil use and management, 5(1), 16–24. https://doi.org/10.1111/j.1475-2743.1989.tb00755.x
- [15] Gebbers, R., & Adamchuk, V. I. (2010). Precision agriculture and food security. Science, 327(5967), 828-831. https://doi.org/10.1126/science.1183899
- [16] Richards, F. J. (1959). A flexible growth function for empirical use. Journal of experimental botany, 10(2), 290–301. https://doi.org/10.1093/jxb/10.2.290
- [17] Yin, X., Goudriaan, J. A. N., Lantinga, E. A., Vos, J. A. N., & Spiertz, H. J. (2003). A flexible sigmoid function of determinate growth. Annals of botany, 91(3), 361–371. https://doi.org/10.1093/aob/mcg029
- [18] Zeide, B. (1993). Analysis of growth equations. Forest science, 39(3), 594–616. https://doi.org/10.1093/forestscience/39.3.594
- [19] Shi, J. X., Goldschmidt, E. E., Goren, R., & Porat, R. (2007). Molecular, biochemical and anatomical factors governing ethanol fermentation metabolism and accumulation of off-flavors in mandarins and grapefruit. Postharvest biology and technology, 46(3), 242–251. https://doi.org/10.1016/j.postharvbio.2007.05.009
- [20] Vikram, P., Swamy, B. M., Dixit, S., Ahmed, H., Cruz, M. S., Singh, A. K., ... & Kumar, A. (2012). Bulk segregant analysis:“An effective approach for mapping consistent-effect drought grain yield QTLs in rice.” Field crops research, 134, 185–192. https://doi.org/10.1016/j.fcr.2012.05.012
- [21] Holland, J. H. (1975). Adaptation in natural and artificial systems: An introductory analysis with applications to biology, control, and artificial intelligence. University of Michigan Press. https://mitpress.mit.edu/9780262581110/adaptation-in-natural-and-artificial-systems/
- [22] Wardlaw, R., & Bhaktikul, K. (2004). Application of genetic algorithms for irrigation water scheduling. Irrigation and drainage: The journal of the international commission on irrigation and drainage, 53(4), 397–414. https://doi.org/10.1002/ird.121
- [23] Yu, Z., & Fu, W. (2025). Optimization of nitrogen fertilization strategies for drip irrigation of cotton in large fields by DSSAT combined with a genetic algorithm. Applied sciences, 15(7), 3580. https://doi.org/10.3390/app15073580
- [24] Salcedo, R., Zhu, H., Ozkan, E., Falchieri, D., Zhang, Z., & Wei, Z. (2021). Reducing ground and airborne drift losses in young apple orchards with PWM-controlled spray systems. Computers and electronics in agriculture, 189, 106389. https://doi.org/10.1016/j.compag.2021.106389
- [25] Eberhart, R., & Kennedy, J. (1995). Particle swarm optimization. Proceedings of the IEEE international conference on neural networks (Vol. 4, pp. 1942–1948). IEEE. https://doi.org/10.1109/ICNN.1995.488968
- [26] Nagesh Kumar, D., & Janga Reddy, M. (2007). Multipurpose reservoir operation using particle swarm optimization. Journal of water resources planning and management, 133(3), 192–201. https://doi.org/10.1061/(ASCE)0733-9496(2007)133:3(192)
- [27] Garg, N. K., & Dadhich, S. M. (2014). Integrated non-linear model for optimal cropping pattern and irrigation scheduling under deficit irrigation. Agricultural water management, 140, 1–13. https://doi.org/10.1016/j.agwat.2014.03.008
- [28] Noory, H., Liaghat, A. M., Parsinejad, M., & Haddad, O. B. (2012). Optimizing irrigation water allocation and multicrop planning using discrete PSO algorithm. Journal of irrigation and drainage engineering, 138(5), 437-444. https://doi.org/10.1061/(ASCE)IR.1943-4774.0000426
- [29] Storn, R., & Price, K. (1997). Differential evolution–A simple and efficient heuristic for global optimization over continuous spaces. Journal of global optimization, 11(4), 341–359. https://doi.org/10.1023/A:1008202821328
- [30] Das, S., & Suganthan, P. N. (2010). Differential evolution: A survey of the state-of-the-art. IEEE transactions on evolutionary computation, 15(1), 4–31. https://doi.org/10.1109/TEVC.2010.2059031
- [31] Das, S., Mullick, S. S., & Suganthan, P. N. (2016). Recent advances in differential evolution–An updated survey. Swarm and evolutionary computation, 27, 1–30. https://doi.org/10.1016/j.swevo.2016.01.004
- [32] Chen, L., Xie, H., Wang, G., Qian, X., Wang, W., Xu, Y., ... & Yang, J. (2021). Reducing environmental risk by improving crop management practices at high crop yield levels. Field crops research, 265, 108123. https://doi.org/10.1016/j.fcr.2021.108123
- [33] Zhao, J., Han, T., Wang, C., Jia, H., Worqlul, A. W., Norelli, N., ... & Chu, Q. (2020). Optimizing irrigation strategies to synchronously improve the yield and water productivity of winter wheat under interannual precipitation variability in the North China Plain. Agricultural water management, 240, 106298. https://doi.org/10.1016/j.agwat.2020.106298
- [34] Yang, L., Bi, P., Tang, H., Zhang, F., & Wang, Z. (2022). Improving vegetation segmentation with shadow effects based on double input networks using polarization images. Computers and electronics in agriculture, 199, 107123. https://doi.org/10.1016/j.compag.2022.107123
- [35] Mirjalili, S., Mirjalili, S. M., & Lewis, A. (2014). Grey wolf optimizer. Advances in engineering software, 69, 46–61. https://doi.org/10.1016/j.advengsoft.2013.12.007
- [36] Niu, W. J., Feng, Z. K., Liu, S., Chen, Y. B., Xu, Y. S., & Zhang, J. (2021). Multiple hydropower reservoirs operation by hyperbolic grey wolf optimizer based on elitism selection and adaptive mutation: Niu W. j. et al. Water resources management, 35(2), 573–591. https://doi.org/10.1007/s11269-020-02737-8
- [37] Wu, L., Tian, J., Liu, Y., Wang, Y., & Zhang, P. (2024). Multi-objective planting structure optimisation in an irrigation area using a grey wolf optimisation algorithm. Water, 16(16), 2297. https://doi.org/10.3390/w16162297
- [38] Migallon, H., Jimeno-Morenilla, A., Sánchez-Romero, J. L., & Belazi, A. (2020). Efficient parallel and fast convergence chaotic Jaya algorithms. Swarm and evolutionary computation, 56, 100698. https://doi.org/10.1016/j.swevo.2020.100698
- [39] Wang, X. A., Tang, J., & Whitty, M. (2021). DeepPhenology: Estimation of apple flower phenology distributions based on deep learning. Computers and electronics in agriculture, 185, 106123. https://doi.org/10.1016/j.compag.2021.106123
- [40] Tagkopoulos, I., Brown, S. F., Liu, X., Zhao, Q., Zohdi, T. I., Earles, J. M., ... & Youtsey, G. D. (2022). Special report: AI institute for next generation food systems (AIFS). Computers and electronics in agriculture, 196, 106819. https://doi.org/10.1016/j.compag.2022.106819
- [41] Isied, R. S., Mengi, E., & Zohdi, T. I. (2022). A digital-twin framework for genomic-based optimization of an agrophotovoltaic greenhouse system. Proceedings: Mathematical, physical and engineering sciences, 478(2267), 1–17. https://www.jstor.org/stable/27203349
- [42] Popova, Z., Eneva, S., & Pereira, L. S. (2006). Model validation, crop coefficients and yield response factors for maize irrigation scheduling based on long-term experiments. Biosystems engineering, 95(1), 139–149. https://doi.org/10.1016/j.biosystemseng.2006.05.013
- [43] Sarshar, A., Tranquilli, P., Pickering, B., McCall, A., Roy, C. J., & Sandu, A. (2017). A numerical investigation of matrix-free implicit time-stepping methods for large CFD simulations. Computers & fluids, 159, 53–63. https://doi.org/10.1016/j.compfluid.2017.09.014
- [44] Zinnanti, C., Schimmenti, E., Borsellino, V., Paolini, G., & Severini, S. (2019). Economic performance and risk of farming systems specialized in perennial crops: An analysis of Italian hazelnut production. Agricultural systems, 176, 102645. https://doi.org/10.1016/j.agsy.2019.102645
- [45] Abendroth, L. J., Elmore, R. W., Boyer, M. J., & Marlay, S. K. (2011). Corn growth and development. https://crops.extension.iastate.edu/cropnews/2011/04/corn-growth-classic-rewritten-and-available-order
- [46] Nielsen, R. L. (2020). Tassel emergence & pollen shed. Purdue University, Department of Agronomy, Corny News Network. https://www.agry.purdue.edu/ext/corn/news/timeless/Tassels.html